28 



Cincinnati Society of Natural History. 



showing the remarkable posterior lanceolate extension, which 

 curves upward, so that the point is higher than the beak of 

 the shell. Both sulci arise behind the beak and extend to 

 the postero-basal part of the shell where the intervening 

 ridge terminates in an acute point. The posterior sulcus is 

 deep, and seems to bound the body of the animal, leaving a 

 thin, lanceolate, upward-curving, wing-like extension behind 

 it. The specimen illustrated was found at the same place 

 that the original types were found, in the middle part of the 

 Hudson River Group, at Sharonville, Hamilton County, Ohio, 

 and is now in the collection of Mr. Charles L. Faber. 



Bellerophon globularis, n. sp 



Plate /, Fig- 21 , dorsal view of a specimen not perfect at the 

 aperture ; Fig. 22, dorsal view shewing the lateral, backward 

 curve of the aperture. 



Shell medium or rather below medium size ; globular in 

 form and closely coiled. Umbilicus closed. Aperture bilobed, 

 wider than the antero-posterior diameter, lip laterally curved 

 backward or trumpet-shaped, deeply sinuate or notched in 

 front. The dorsum of the outer volution is broad, and bears 

 two concave, shallow furrows, that increase in width toward 

 the aperture, and are separated by a low, rounded band. Sur- 

 face marked by concentric lines of growth, which, ascending 

 from the umbilicus, curve forward on the sides and then more 

 abruptly backward on the dorsum, so as to cross the central 

 rounded band in a short and sharp curve, in line with the 

 deep notch in the anterior margin of the aperture. 



This species, in its globular form, bilobed aperture and sur- 

 face markings, is very much like B. bilobatus, from which it is 

 distinguished by the broad, shallow furrows on the dorsum 

 and trumpet-shaped lateral lips. Found in the lower part of 

 the Hudson River Group, at Cincinnati, Ohio, though good 

 specimens are quite rare. The two specimens illustrated are 

 from the collection of Mr. C. L. Faber. 



